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Effects of potassium fertilization on winter wheat under different production practices in the North China Plain

文献类型： 外文期刊

作者： Niu, Junfang 1 ; Zhang, Weifeng 2 ; Ru, Shuhua 3 ; Chen, Xinping 2 ; Xiao, Kai 4 ; Zhang, Xiying 1 ; Assaraf, Menachem 5 ;

作者机构： 1.Chinese Acad Sci, Key Lab Agr Water Resources, Ctr Agr Resources Res, Inst Genet & Dev Biol, Shijiazhuang 050021, Peoples R China

2.China Agr Univ, Ctr Resources Environm & Food Secur, Key Lab Plant Soil Interact, Minist Educ, Beijing 100193, Peoples R China

3.Hebei Acad Agr & Forestry Sci, Inst Agr Resources & Environm, Shijiazhuang 050051, Peoples R China

4.Agr Univ Hebei, Coll Agron, Baoding 071001, Peoples R China

5.Int Potash Inst, CH-8810 Horgen, Switzerland

关键词： Potassium;Winter wheat (Triticum aestivum L.);Production practices;Potassium balance

期刊名称：FIELD CROPS RESEARCH （ 影响因子：5.224； 五年影响因子：6.19 ）

ISSN： 0378-4290

年卷期： 2013 年 140 卷

页码：

收录情况： SCI

摘要： Haplic Luvisols with low to medium grade of potassium occur in major agricultural regions of north China. Moreover, unbalanced fertilization has rapidly depleted soil available potassium (K) and hence caused significant yield response to K fertilization in many intensive farming systems. Our specific objectives in this study were to determine winter wheat (Triticum aestivum L) response to K fertilization on Haplic Luvisols in the North China Plain (NCP) as affected by conventional as well as high-yielding production practices. Four field experiments were conducted in the NCP. The factorial study compared three levels of K fertilization (K0 = no K; K1 = medium K rate; K2 = high K rate) and two levels of production practices: conventional (CP) and high yielding (HP). A significant positive wheat yield response to K fertilization was obtained under both CP and HP at all site-years. On average, K fertilization significantly increased all three yield components measured, namely kernel number per spike, spike number per hectare and kilo-grain weight. Overall, HP outperformed CP in terms of wheat grain and biomass yield. Nutrient use efficiency of N and P was increased by K application, especially under HP. Overall, HP surpassed CP with regard to partial factor productivity of N and K (PFPN and PFPK) across the four site-years, whereas the opposite trend was found for partial factor productivity of P (PFPP) due to increasing P input. Negative K balances were observed in all of the treatments in both years and under both production practices, especially under HP. Economic profits were achieved under both production practices, but there were no significant differences between CP and HP on average, across four site-years. Therefore, farmers who are planting wheat on Haplic Luvisols in the NCP must take account of the K fertility of their soils for sustainable crop production. (C) 2012 Elsevier B.V. All rights reserved.

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